Ask HN: How to Teach Software Architecture?

I am working as a software development trainer and consultant. In 2020 I will have a new challenge - training & coaching a few people to become software architects, from their current positions (senior software developers, mainly).

The main interest and focus will be on distributed systems (generally) and microservices (particularly).

Any recommendations on books or (at least) articles on a learning path are more than welcomed. Thank you, in advance.